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Thresholds for vestibular-evoked myogenic potentials (VEMPs) produced by impulsive transmastoid acceleration
Aurore C Paillard1, Karolina Kluk, Neil P M Todd
1* Faculty of Life Sciences, University of Manchester , UK.
Objective:
To evaluate methods for estimating thresholds of vestibular evoked myogenic potentials (VEMPs) and ocular VEMPs (OVEMPs) produced by impulsive transmastoid acceleration (ITA).
Design:
VEMPs and OVEMPs were obtained simultaneously from subjects in supine posture with both head and eyes elevated. Thresholds to ITA were measured using four different response identification methods.
Study Sample:
Twelve adult subjects with no history of auditory or vestibular deficits.
Results:
VEMP and OVEMP thresholds were found within the range of -8 to -26 dB re 0.2 g, with overall VEMP thresholds being lower than OVEMP thresholds by average of 3-10 dB, depending on the method used.
Conclusion:
VEMPs can be obtained at lower ITA stimulation levels than OVEMPs. Threshold values depend on the method used to define response presence.
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